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Where a traditional harp instrument is played by plucking strings, this
harp is played by breaking laser beams! Using a single FPGA-based PXI R
Series board, analog outputs are used to steer the laser beam and to
generate audio for the speakers. Digital lines are also used to pulse the
laser on and off, which and separates each individual laser beam, and to
take frequency measurements from a photo sensor. Even though it looks like
multiple lasers, only one is actually used. The control system quickly
rotates a tiny mirror that reflects the laser into each string position.
The R Series board constantly takes measurements from the sensor where it
performs over 40 million calculations per second to synchronize the
measurements with the current mirror position and to determine which note
to play. Because code is implemented in hardware on the FPGA, it runs with
speed and reliability. |  |
PXI-7854R
PXI-1031
NI 8105
Cable: NI SHC68-68-RMIO
SCB-68
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Todd S.
LabVIEW Community Manager
National Instruments
